<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .btn{
            font-weight: normal;
            color: #fff;
            font-size: 18px;
            padding: 20px;
            cursor: pointer;
        }
        .danger{
            background-color: red;
        }
        .warning{
            background-color: #f6c12a;
        }
        .normal{
            background-color: #57b5e3;
        }
        .cancel{
            background-color: #57b5e3;
        }

    </style>
</head>
<body>
    <strong class="btn normal">确定</strong>
    <strong class="btn warning">重置</strong>
    <strong class="btn cancel">取消</strong>
    <strong class="btn danger">删除</strong>
    <strong class="btn danger">关闭</strong>
</body>
</html>